diff options
| -rw-r--r-- | contrib/nvi/common/exf.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/contrib/nvi/common/exf.c b/contrib/nvi/common/exf.c index 57f5748..8c4dea5 100644 --- a/contrib/nvi/common/exf.c +++ b/contrib/nvi/common/exf.c @@ -837,10 +837,39 @@ file_write(sp, fm, tm, name, flags) SIGBLOCK; if ((fd = open(name, oflags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) < 0) { + if (errno == EACCES && LF_ISSET(FS_FORCE)) { + /* + * If the user owns the file but does not + * have write permission on it, grant it + * automatically for the duration of the + * opening of the file, if possible. + */ + struct stat sb; + mode_t fmode; + + if (stat(name, &sb) != 0) + goto fail_open; + fmode = sb.st_mode; + if (!(sb.st_mode & S_IWUSR) && sb.st_uid == getuid()) + fmode |= S_IWUSR; + else + goto fail_open; + if (chmod(name, fmode) != 0) + goto fail_open; + fd = open(name, oflags, S_IRUSR | S_IWUSR | + S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); + if (fd == -1) + goto fail_open; + (void)fchmod(fd, sb.st_mode); + goto success_open; + fail_open: + errno = EACCES; + } msgq_str(sp, M_SYSERR, name, "%s"); SIGUNBLOCK; return (1); } +success_open: SIGUNBLOCK; /* Try and get a lock. */ |
